What is the LEE Filters SW150 Adaptor Sigma 20mm?
From the excellent Lee SW150 range, this particular Lee Filters Adaptor is for the Sigma 20mm lens. The Adaptor consists of a front ring, a compressor ring and a locking ring specifically designed for the Sigma 20mm f1.4 HSM Art lens.
The Lee Filters SW150 Mark II Holder will fit your lens via this adaptor. This holder is compatible with the SW150 polarizer, Little Stopper, Big Stopper, SW150 neutral density graduated and standard filters.